28561829 has 2 divisors, whose sum is σ = 28561830. Its totient is φ = 28561828.

The previous prime is 28561823. The next prime is 28561867. The reversal of 28561829 is 92816582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28376929 + 184900 = 5327^2 + 430^2 .

It is a cyclic number.

It is not a de Polignac number, because 28561829 - 2²⁴ = 11784613 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28561823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14280914 + 14280915.

It is an arithmetic number, because the mean of its divisors is an integer number (14280915).

Almost surely, 2^28561829 is an apocalyptic number.

It is an amenable number.

28561829 is a deficient number, since it is larger than the sum of its proper divisors (1).

28561829 is an equidigital number, since it uses as much as digits as its factorization.

28561829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 41.

The square root of 28561829 is about 5344.3268051271. The cubic root of 28561829 is about 305.6764668268.

The spelling of 28561829 in words is "twenty-eight million, five hundred sixty-one thousand, eight hundred twenty-nine".